World’s forgotten fishes vital for hundreds of millions of people but one-third face extinction, warns new report | WWF
World’s forgotten fishes vital for hundreds of millions of people but one-third face extinction, warns new report

Posted on 28 February 2021

The world’s dazzlingly diverse freshwater fishes are critical for the health, food security and livelihoods of hundreds of millions of people, but they are under ever increasing threat with one in three already threatened with extinction, according to a report published today by 16 global conservation organizations.
World’s Forgotten Fishes details the extraordinary variety of freshwater fish species, with the latest discoveries taking the total to 18,075 – accounting for over half of all the world’s fish species and a quarter of all vertebrate species on Earth. . In the Mekong river alone, there are 1,148 species and the river host 4 of the world’s 10 largest freshwater fish. This wealth of species is essential to the health of the world’s rivers, lakes and wetlands – and supports societies and economies across the globe.
Freshwater fisheries provide the main source of protein for 200 million people across Asia, Africa and South America, as well as jobs and livelihoods for 60 million people. In Viet Nam, fish is one of the most popular sources of animal protein 30–35% of protein consumption of Vietnamese people is derived from fish products. It is estimated that some  Healthy freshwater fish stocks also sustain two huge global industries: recreational fishing generates over US$100 billion annually, while aquarium fishes are the world’s most popular pets and drive a global trade worth up to US$30 billion.
But freshwater fishes continue to be undervalued and overlooked – and thousands of species are now heading towards extinction. Freshwater biodiversity is declining at twice the rate of that in our oceans or forests. Indeed, 80 species of freshwater fish have already been declared ‘Extinct’ by the IUCN Red List of Threatened Species, including 16 in 2020 alone. In our region, the Mekong Giant Catfish are both listed as critically endangered. Meanwhile, populations of migratory freshwater fish have fallen by 76 per cent since 1970 and mega-fish by a catastrophic 94 per cent.
“Nowhere is the world’s nature crisis more acute than in our rivers, lakes and wetlands, and the clearest indicator of the damage we are doing is the rapid decline in freshwater fish populations. The 6th mass biodiversity crisis is happening in rivers much faster than in forests and oceans, and nobody knows about it,” said Stuart Orr, WWF global Freshwater Lead. “Despite their importance to local communities and indigenous people across the globe, freshwater fish are invariably forgotten and not factored into development decisions about hydropower dams or water use or building on floodplains. Freshwater fish matter to the health of people and the freshwater ecosystems that all people and all life on land depend on. It’s time we remembered that.”
The report highlights the devastating combination of threats facing freshwater ecosystems – and the fishes that live in them – including habitat destruction, hydropower dams on free flowing rivers, over abstraction of water for irrigation, and domestic, agricultural and industrial pollution. In addition, freshwater fishes are also at risk from overfishing and destructive fishing practices, the introduction of invasive non-native species and the impacts of climate change as well as unsustainable sand mining , which alter fish biosphere and stocks, and wildlife crime. For example:
  • The hilsa fishery in the Ganges upstream of Farakka crashed from a yield of 19 tonnes to just 1 tonne per year after the construction of the Farakka barrage in the 1970s;
  • Poaching for illegal caviar is a key reason why sturgeons are one of the world’s most threatened animal families, while Critically Endangered European eels are the most trafficked animal; and
  • Excessively high fishing quotas in Russia’s Amur river contributed to a catastrophic fall in the country’s largest salmon run with no chum salmon found in spawning grounds in summer 2019.
There is a long list of threats, but there are also solutions – and 2021 offers real hope that the world can turn the tide and start to reverse decades of decline in freshwater fish populations. The world must seize the opportunity to secure an ambitious and implementable global biodiversity agreement at the UN Convention on Biological Diversity (CBD) conference in Kunming, China – one that must, for the first time, pay just as much attention to protecting and restoring our freshwater life support systems as the world’s forests and oceans.
“The good news is that we know what needs to be done to safeguard freshwater fishes. Securing a New Deal for the world’s freshwater ecosystems will bring life back to our dying rivers, lakes and wetlands. It will bring freshwater fish species back from the brink too – securing food and jobs for hundreds of millions, safeguarding cultural icons, boosting biodiversity and enhancing the health of the freshwater ecosystems that underpin our well-being and prosperity,” said Orr.
“As much as in the global practice, also in Viet nam what we need now is to recognize the value of freshwater fish and fisheries, and for governments to commit to new targets and solutions implementation, as well as prioritizing which freshwater ecosystems need protection and restoration. We also need to see partnerships and innovation through collective action involving governments, businesses, investors, civil society and communities," said Orr.
Fisherman holding up a piranha
© Camilo Díaz / WWF Colombia
Freshwater fishes make up 1/4 of all vertebrate species on Earth.
Freshwater fish provide livelihoods for 60 million people.
Freshwater fishes are critical to the food security of 200 million people.
1/3 of freshwater fishes are threatened with extinction.